Alloy



Patented Sept. 24, 1935 1 UNITED. STATES PATENT OFFICE ALLOY Robert H.Leach, Fairfield, Conn., assignor to Randy & Harman, New York, N. Y., acorpora tion of New York No Drawing. Application February 5, .1935,

Serial No. 5,054

rosion resulting from certain types of chloride attack. Also, in certainforms, the alloy flows well at relatively low temperatures, a featurewhich enables the user to make strong joints with great facility.

The new alloy contains silver, copper, zinc, cadmium, and nickel, andthe ranges of these ingredients are substantially as follows:

Per cent j Silver 1 30-60 Copper 1. 12-35 Zinc 5-20 Cadmium 1 5-20Nickel 1-5 Example N0. 1

Per cent Silver 31.50 Copper 31.00 Melting point 1180 F. Zinc 16.50 Flowpoint 1425 F. Cadmium 19.00 a5 Nickel 2.00

Example N0. 2

Silver 40.00 Copper 21.00 Melting point1180 F. 40 Zinc 18.00 Flowpoint-.. 1370 F. Cadmium 19.00 Nickel 3.00

Example 'No. 3

45 Silver 50.00

Copper 15.50 Melting point 1195? F. Zinc 15.50 Flow point" 1270 F.Cadmium 16.00 Nickel 3.00

Example- No. 4

.Silver 60.00 1

Copper 25.00 Melting point 1315 F. Zinc 8.00 Flow point 1515 F. 5Cadmium 6.00 Nickel 1.00

The presence of the nickel within the range mentioned appears to beaccountable for the in-,-

creased corrosion resistance of the new alloy, 10

and the optimum resistance to corrosion is obtained when the nickel ispresent in an amount of about 3%. The presence of the nickel increasesthe melting point, but, as shown by the foregoing examples, theproportions of the other ingredients of the alloy may be so selected asto give it a flow point as low as '1270, which is sufficiently low formost purposes.

I claim:- l

1. An alloy which consists of silver from about 2 30% to about 60%,copper from about 12% to about zine-from about 5% to about 20%; cadmiumfrom about 5% to about 20%, and nickel from-about 1% t'o-about 3%.

2. An alloy which consists of silver'from about 25 30% to about copperfrom about 12% to about 35% zinc from about 5% to about 20%, cadmiumfrom about 5% to about 20%, and nickel from about 1% to about 3%.

3. An alloy which consists of silver from about 30 40% to about 50%,copper from about 12% to about 35%, zinc from about 5% to about 20%,cadmium from about 5% to about 20%, and nickel from about 1% to about3%.

4. An alloy which-consists of silver from about '50% to about 60%,copper from about 12% to about 35%, zinc from about 5% to about 20%.cadmium from about 5% to about 20%, and nickel from about 1% to about3%. p

5. An alloy which consists of about 31.5% sil- 40 ver, about 31% copper,about 16.5% zinc, about 19% cadmium, and about 2% nickel.

6. An alloy which consists of about 40% silver, about 21% copper, about18% zinc, about 19% cadmium, and about 2% nickel.

'7. An alloy which consists of about silver, about 15.5% copper, about15.5% zinc, about 16% cadmium, and about 3% nickel.

ROBERT H. LEACH. 50

- 'JQCERI'IIFICATE or 'GOR'RECTIION. 7

i -lll tj o- .9 33 5 I ,Se pte m'ber124, 1935.

ROBERT 11.2mm

x iti hereby certified that error appears in the printed specificationof the.above jwnber'ed patentrequiringi corrgtion as fo'llowszi Firstcolumn} iine 42, of Example} 2; for "3.00" rei1d"2.00; 'and that thesaidLrtters Patent should be rad with this 'correc'tionthe rein that thesame [nay conf-ormfto. the rec or'd of the case in-the Iatent' Office. i

Signe i and sea'lgd this 5th day of' November, ;A; D. 1935.

Letl ig- Fr azgr (S eal) Acting .Commissi tn er 9f Pa tents.

